Patents by Inventor Raymond J. Dufty

Raymond J. Dufty has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7556466
    Abstract: A trailer including: (i) a trailer frame supported by ground engaging wheels; (ii) an auxiliary drawbar pivotable from a retracted inoperative position to an extended or towing position located behind the trailer frame; and a (iii) main drawbar capable of being attached to a prime mover. There is also provided a pivot frame pivotally attached to the trailer frame by pivot attachment joints which may extend from an extended leading position for maintenance apparatus to a retracted transportation position.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: July 7, 2009
    Assignee: Tru-Turf Pty Ltd
    Inventor: Raymond J. Dufty
  • Publication number: 20080303249
    Abstract: A trailer including: (i) a trailer frame supported by ground engaging wheels; (ii) an auxiliary drawbar pivotable from a retracted inoperative position to an extended or towing position located behind the trailer frame; and a (iii) main drawbar to a prime mover. There is also provided a pivot frame pivotally attached to the trailer frame by pivot attachment means which may extend from an extended leading position for maintenance apparatus to a retracted transportation position.
    Type: Application
    Filed: August 8, 2008
    Publication date: December 11, 2008
    Inventor: Raymond J. Dufty
  • Patent number: 7438516
    Abstract: A trailer including (i) a trailer frame supported by ground engaging wheels; (ii) an auxiliary drawbar pivotable from a retracted inoperative position to an extended or towing position located behind the trailer frame; and a (iii) main drawbar to a prime mover. There is also provided a pivot frame pivotally attached to the trailer frame by pivot attachment joints which may extend from an extended leading position for maintenance apparatus to a retracted transportation position.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: October 21, 2008
    Assignee: Forestfield Pty Ltd
    Inventor: Raymond J. Dufty
  • Patent number: 5509487
    Abstract: A coring apparatus for forming a plurality of vertical cores or bores in the ground surface which includes a mobile wheeled frame supporting a plurality of rotatably driven, vertically moveable drilling members which are moved between a lowered operative position and an elevated inoperative position in which the drilling members are oriented above the ground surface. The drilling members are mounted on a movable frame component that is pivotally supported from the wheel frame at one end thereof with the opposite end of the moveable frame component supporting the drilling members and connected with crank members powered from a drive motor to raise and lower the moveable frame component and the drilling members.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: April 23, 1996
    Inventors: Raymond J. Dufty, Ronald S. Kaye
  • Patent number: 5468267
    Abstract: Rolling apparatus (10) for rolling of level surfaces of turf or grass including a mobile main frame (11) and an undercarriage (12) having at least three ground contacting rollers (37, 38, 40) which are all unevenly spaced.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: November 21, 1995
    Inventors: Raymond J. Dufty, Ronald S. Kaye